NEW YORK, Feb 1 (Reuters) - U.S. Olympic Committee officials were told in 2015 that an investigation by USA Gymnastics uncovered possible criminal sexual abuse by team doctor Larry Nassar but they failed to intervene, The Wall Street Journal reported on Thursday.

USA Gymnastics then-president Steve Penny called Scott Blackmun, the chief executive of the U.S. Olympic Committee, in July 2015 with a request for guidance on how to handle allegations Nassar had sexually abused gymnasts, the Journal said, citing people familiar with the matter.

Nassar plead guilty to sexual assault in a Michigan court and received a sentence of up to 175 years in prison on Jan. 24.

On the call, Penny told Blackmun he planned to alert law enforcement after a gymnast described what appeared to be a sexual assault by Nassar, the newspaper reported.

Blackmun told Penny to "do what he had to do," but provided no further guidance to USA Gymnastics in the months to come on how to handle the matter, it said.

Blackmun told the Journal that he had urged Penny to turn over the case to law enforcement, and that the USOC's own upcoming investigation would examine what individuals knew about Nassar and when, the newspaper said.

In response to The Wall Street Journal Story, the USOC reiterated in an email to Reuters it was launching an independent probe "to determine what complaints were made, when, to whom, and what was done in response." USA Gymnastics did not immediately respond to requests for comment.

Many of Nassar's victims have criticized the USOC for failing to remove him sooner. That has come as part of wider outrage at USA Gymnastics, the sport's governing body in the United States, and Michigan State University, where Nassar was employed and abused many of his victims.

Under pressure from the USOC, the entire board of USA Gymnastics resigned last week. The president and athletic director at Michigan State University also stepped down.

The Journal said that Penny, who resigned from his post last year, followed up later in 2015 with an email to USOC Chief Security Officer Larry Buendorf that described Nassar's questionable treatment of three gymnasts and outlined USA Gymnastics' handling of the matter.

USA Gymnastics has said it contacted the Indianapolis office of the Federal Bureau of Investigation on July 27, 2015, which instructed it not to comment on the matter so as not to compromise its investigation, the newspaper said. (Reporting by Peter Szekely in New York; Editing by Andrew Hay)